Gas and smoke consuming furnace



(No Model.) '2 SI1ets''-Slie6t"l. 0.0. HARTUNG & E. WALSH, Jr. GAS AND SMOKE GONSUMING FURNACE Patented Dec. 17, 1889.

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0. 0. HARTUNG & E. WALSH, Jr. GAS AND SMOKE OONSUMINGFU RNAOE.

No. 417,556." Patented p 17, 1889.

, p Y //////////////////////////////////////////////////A 'i m- A a" hugnpher, manm n c UNITED; STATES PATENT OFFICE.

CHARLES C. HARTUNG AND EDWARD WALSH, JR, OF ST. LOUIS, MISSOURI.

GAS AND SMOKE CONSUMING FURNACE.

SPECIFICATION forming part of Letters l atent No. 417,556, dated December 1'7, 1889. Applicatidn 'filed December 22, 1888- 1 Serial No. 294,382. (No model.)

To al Z whom it may concern.-

Be it known that we, CHARLES C. HARTUNG and EDWARD YVALSH, J r., citizens of the United States, residing at the city of St. Louis, State of Missouri, have invented certain new and useful'lmprovements in Gas and Smoke Consuming Furnaces, of which the following is a full, clear, and exact description.

Our invention relates to improvements in furnaces designed for the combustion of gaseous fuel-"either the carbonic oxide, more or less mixed with hydrocarbon vapors, as obtained from burning fuel in a producer, or the carbureted-hydrogen gas known as natural gas and our invention has for its object to increase the heat and prevent the escape of smoke from the furnace by effecting a more complete combustion of the gases than has hitherto been obtained.

It consists in a furnace having its combustion-chamber contracted toward the point of exit of the products of combustion therefrom, combined with an arrangement of openings and passages and a hood therefor, through which openings the combustible gases, at a suitable temperature, and heated air are respectively and simultaneously admitted to the furnace-chamber, whereby a thorough combustion of the'gases is obtained.

On the accompanying drawings, Figure 1 represents a central longitudinal sectional elevation of a furnace and appurtenances embodying our invention and applied to a steam-boiler; Fig. 2, a sectional plan thereof on line 1 1 in Fig. 1, omitting the boiler; Fig. 3, a sectional plan on line 2 2 in Fig. 1; Fig.

4, a transverse section on line 3 3 in Fig. 1;

Fig. 5, a side sectional elevation following line 4 4 in Fig. 4; Fig. 6, an inside elevation of the furnace side wall, taken on,line 5 5 in Fig. 3, broken away; and,Fig. 7, an end view thereof, like letters of reference denoting like parts in all the figures.

a represents the furnace or combustionchamber, having the side walls 17 and floor 0. Above the furnace a is mounted a steamboiler d, having tubes 6 and return-flue f to the chimney 9, arranged as shown, or in any other desirable and well-known manner. The floor c for a certain distance from its front end is preferably flat, and thence preferably of a concave section transversely, gradually tapering or diminishing toward the rear or outlet end of the combustion-chamber a, so that the terminal space between the floor c and exposed circumferential portion of the rear end of the boiler d adjacent to the uptake his equivalent or approximate to'the combined sectional areas of the tubes 6.

Opening into the combustion-chamber a through the fiat portion -of its floor c and supporting brick-work i is a passage or passages j, which communicate with the producer is, wherein carbonic-oxide gas is produced. The producer k is located as closely as possible to the furnace to, so that the gases passing from the producer It may not be cooled to any serious extent, but enter the combustion chamber a through passages j at a suitable temperature of from 800 to 1,200 Fahrenheit.

Immediately beneath the floor 0 0f the combustion-chamber a is an air-chamber l, which is divided by walls m into passages n n M, the passages n being arranged for conducting air admitted thereto -preferably .from the front ends of the side walls I) along the under side of the furnace-floor 0 into the passage n, through which the air returns along the under side of the floor 0, and, impinging against the rear end of the brick-work t', which supports the floor 0 thereat, is thereby directed along the passages 01, to the wall I), beneath the front end of the boiler d, where it passes through lateral openings 0 in the brick-work 'i,

r and through a vertical passage 19 into the furnace or combustion-chamber aat the level of its floor 0 and adjacent to the gas-opening j.

Cold air is admitted to the passages n from the external atmosphere, preferably through boxes g, which are built into the side walls I) and provided at their inlet-openings with registers 0'" or other devices for regulating the supply of air; or the admission of air to the passages n may be effected in any other manner, as found most suitable in practice.

s is an auxiliary passage which opens from the passage n at the rear end of the supporting brick-work i into the furnace-chamber a adjacent to the gas-opening j.

It will be noted on reference to Figs. 2 and 3 of the drawings that the rear opening or passage 19 is wider than and laps over the gas openingor passage j, and the gas-opening j is in turn wider than and laps over the auxiliary air-opening s.

In operation the carbonic oxide and associated vapors passing from the producer L are admitted through the passage j into the front portion of the furnace or combustionchamber a at a suitable temperature, which is preferably between 800 and 1,200 Fahrenheit. At the same time cold air is admitted through the wall-boxes q to the chamber Z, and, traversing the passages 12 n n beneath the furnace-floor c, is thereby heated and enters the furnace-chamber a through the openin gs o p and partly through opening 5-, where, mixing with the heated gases, an intense combustion of the latter is induced, and as the products of combustion are impelled toward the rear end of the boiler d the gradually-decreasing area of the space between the latter and the combustion-011amber a concentrates and prevents the expansion or cooling of the gases, which are thereby thoroughly consumed and their heat utilized to the best advantage 011 the boiler (Z, before passing through the tubes e-a condition hitherto unattainable with the present construction of furnaces.

For protecting the boiler d from the direct impingement of the flames at the openings j and p in the furnacewhamber a, we may interpose a fire-brick arch t thereatl By our invention almost perfect combustion without smoke is obtained and fuel greatly economized.

\Ve claim as our invention- 1. In a furnace for burning gaseous fuel, a combustion-chamber having a series of three parts arranged in line, comprising two airports and an intermediate gas-port, one of said air-ports being of greater width than the gas-port and one of less width, and a hood arranged over said ports and projecting from the combustion-chamber on the side of the widest port, substantially as and for the purposes described.

2. In a furnace, a combustionchamber whose cross-sectional area decreases from the front toward the uptake or stack, said chamber having in its floor at the front a series of three flues of decreasing width from the first to the last of the series, and comprising two air-fines and an intermediate gas-flue, and a hood arranged over said. ports and projecting from the comhustionchamber on the side of the widest port, substantially as and for the purposes described.

In testimony whereof we aiiix our signatures, in presence of two witnesses, this 19th day of December, 1888. I

CHARLES C. IIARTUNG. ED\VARD VALSH, J R. \Vitnesses:

S. L. SCHRADER, J. L. IIORNSBY. 

